Stability of plane Poiseuille-Couette flows of a piezo-viscous fluid
Article
Article Title | Stability of plane Poiseuille-Couette flows of a piezo-viscous fluid |
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ERA Journal ID | 5148 |
Article Category | Article |
Authors | Tran, Thien Duc (Author) and Suslov, Sergey A. (Author) |
Journal Title | Journal of Non-Newtonian Fluid Mechanics |
Journal Citation | 156 (3), pp. 139-149 |
Number of Pages | 11 |
Year | 2009 |
Place of Publication | Netherlands |
ISSN | 0377-0257 |
1873-2631 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jnnfm.2008.07.009 |
Abstract | We examine stability of fully developed isothermal unidirectional plane Poiseuille--Couette flows of an incompressible fluid whose viscosity depends linearly on the pressure as previously considered in Hron01 and Suslov08. Stability results for a piezo-viscous fluid are compared with those for a Newtonian fluid with constant viscosity. We show that piezo-viscous effects generally lead to stabilisation of a primary flow when the applied pressure gradient is increased. We also show that the flow becomes less stable as the pressure and therefore the fluid viscosity decrease downstream. These features drastically distinguish flows of a piezo-viscous fluid from those of its constant-viscosity counterpart. At the same time the increase in the boundary velocity results in a flow stabilisation which is similar to that observed in Newtonian fluids with constant viscosity. |
Keywords | pressure-dependent viscosity; piezo-viscous fluid; plane Poiseuille-Couette flow; hydrodynamic stability |
ANZSRC Field of Research 2020 | 401207. Fundamental and theoretical fluid dynamics |
401204. Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics) | |
401299. Fluid mechanics and thermal engineering not elsewhere classified | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Computational Engineering and Science Research Centre |
Swinburne University of Technology |
https://research.usq.edu.au/item/9yvz0/stability-of-plane-poiseuille-couette-flows-of-a-piezo-viscous-fluid
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